Followers of the Shi'ite Houthi movement flee from tear gas used by the riot police to disperse them, near the cabinet building in Sanaa September 9, 2014. Yemeni troops and Shi'ite Muslim rebels shot at each other at the Western entrance to the capital Sanaa, residents and security sources said, hours after soldiers killed at least four protesters outside the cabinet building. REUTERS/Mohamed al-Sayaghi (YEMEN - Tags: POLITICS RELIGION CIVIL UNREST)